diff --git a/stdlib/3/html/parser.pyi b/stdlib/3/html/parser.pyi
index 874b85057bc5..4c037845a3b0 100644
--- a/stdlib/3/html/parser.pyi
+++ b/stdlib/3/html/parser.pyi
@@ -13,7 +13,7 @@ class HTMLParser(ParserBase):
                         attrs: List[Tuple[str, Optional[str]]]) -> None: ...
     def handle_endtag(self, tag: str) -> None: ...
     def handle_startendtag(self, tag: str,
-                           attrs: List[Tuple[str, str]]) -> None: ...
+                           attrs: List[Tuple[str, Optional[str]]]) -> None: ...
     def handle_data(self, data: str) -> None: ...
     def handle_entityref(self, name: str) -> None: ...
     def handle_charref(self, name: str) -> None: ...